Source: Dustin Pedroia headed to disabled list with new thumb injury

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After sitting out Wednesday's game in Oakland with a jammed right thumb, Pedroia underwent tests today in Boston that revealed a new injury to his thumb. He's expected to be placed on the 15-day disabled list before Friday night's series opener against the Yankees at Fenway Park, according to a major league source, at which point the Red Sox will make a corresponding roster move.

Pedroia (AP photo, right) missed six games last month with a torn adductor muscle in his thumb. At that time, though, the Red Sox' medical staff concurred that he wouldn't do additional damage to the muscle by playing through the injury. This new problem, likely suffered Tuesday night when Pedroia dove for a ball in shallow right field, is in a different area, specifically the back side of the thumb.

The Red Sox open a four-game, three-day series against the Yankees beginning Friday night at Fenway Park.